Rio Tinto, Portugal experiences mild winters with average temperatures ranging from around freezing in January and November to just below 15°C. Spring is a gradual warming period, with April and May averaging highs of around 23-29°C. Summer months are warm, with July and August seeing average highs of up to 36°C, although mornings can still be cool. Autumn brings a cooling trend, with October temperatures returning to around the spring levels. The region's temperature fluctuations are relatively moderate throughout the year, with minimal extreme lows or highs.